yzgkqrRt

1String password="1234";
2   String encode="UTF-8"; 
3   String algoritmo="AES";
4
5      private String encripta(String serie) throws Exception {
6      Cipher cipher=Cipher.getInstance(algoritmo);
7      SecretKeySpec secretKey= generatekey();
8     cipher.init(Cipher.ENCRYPT_MODE,secretKey);
9     byte[] datosencriptadosbytes=cipher.doFinal(serie.getBytes());
10     String datosencriptadosstring= 
11     Base64.encodeToString(datosencriptadosbytes,Base64.DEFAULT);
12     return  datosencriptadosstring;
13}
14	
15private SecretKeySpec generatekey() throws Exception {
16    MessageDigest sha=MessageDigest.getInstance(sha_str);
17    byte[] key=password.getBytes(encode);
18    key=sha.digest(key);
19    SecretKeySpec secretKey=new SecretKeySpec(key,algoritmo);
20    return  secretKey;
21}
22	
23public byte[] AES_Decrypt(byte[] bytesToBeDecrypted, byte[] passwordBytes)
24    {
25       byte[] decryptedBytes = null;
26       byte[] saltBytes = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
27       byte[] saltBytes = Encoding.UTF8.GetBytes("123456789ABCDEF");
28        using (MemoryStream ms = new MemoryStream())
29        {
30            using (AesManaged AES = new AesManaged())
31            {
32                AES.Padding = PaddingMode.Zeros;
33                AES.KeySize = 256;
34                AES.BlockSize = 128;
35
36            var key = new Rfc2898DeriveBytes(passwordBytes, saltBytes,1000);
37                AES.Key = key.GetBytes(AES.KeySize/8 );
38                AES.IV = key.GetBytes(AES.BlockSize /8);
39
40                AES.Mode = CipherMode.ECB;
41                using (var cs = new CryptoStream(ms, AES.CreateDecryptor(), CryptoStreamMode.Write))
42                {
43                cs.Write(bytesToBeDecrypted, 0, bytesToBeDecrypted.Length);
44                cs.Close();
45                }
46                decryptedBytes = ms.ToArray();
47            }
48        }
49
50        return decryptedBytes;
51    }